Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV

"Kim Keller" <kekeller@xxxxxxxxxxxxxxxxx> wrote in
news:q6cye.180626$IO.144592@xxxxxxxxxxxxxxxxxxxxxxx:

> "George William Herbert" <gherbert@xxxxxxxxx> wrote in message
> news:11cgcspa20nk79c@xxxxxxxxxxxxxxxxxxxxx
>>I don't know why people are acting like the roll control
>> stuff is a Big Deal. On a lot of existing boosters,
>> we're talking about a small hydrazine monopropellant thruster
>> pack hung off the side of the booster.
>>
>> Those are NOT hard to develop.
>
> The big deal is having a booster control system developed, tested and
> qualified by the end of 2006, as someone suggested. remember that the
> STS SRB does not have any internal guidance system at present; all
> commands come from the orbiter. So ATK is going to have to develop an
> avionics suite for their schtick, and that won't happen quickly,
> certainly not in time for a flight test in late '06.

Right. Focusing on the roll-thruster hardware is failing to look at the big
picture. You're talking about qualifying a *system* here, not a single
component that may be easy to build in isolation. And considering the
consequences of either an errant SRB crashing through LC39 infrastructure,
or even an "orderly" low-altitude range-safety destruct, NASA is going to
insist on a lot of hoops to be jumped before anyone will be allowed to test
their roll-control system "live" on a 3-million lbf thrust SRB.

--
JRF

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Relevant Pages

  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
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  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
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  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
    ... >I don't know why people are acting like the roll control ... > pack hung off the side of the booster. ... The big deal is having a booster control system developed, ...
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  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
    ... >>>There's no way the avionics and the TVC system will be ready for test ... s.s.shuttle) -- roll control would definitely add to the development ... going to roll the booster 120 degrees after liftoff"), ...
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